Ingersoll Rand industrial quality 6-point impact sockets are impact-grade chrome-molybdenum steel with laser etching. Standard well steel sockets in 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16 and 3/4in. sizes. With blow-molded case. This is a standard socket set, similar, but not identical to the deep-well set shown.